PSLE At a sale, Ahmad bought 10 glasses of the same kind. His aunt bought 7 such glasses. She also bought 3 mugs at $6.20 each. Altogether, she spent $0.30 more than Ahmad. What was the total amount of money Ahmad and his aunt spent?
|
Ahmad |
His aunt |
Items bought
|
10 glasses
|
7 glasses + 3 mugs = 7 glasses + 18.60 |
Comparing the amounts paid |
|
$0.30 more |
Amount that his aunt spent on 3 mugs
= 3 x 6.20
= $18.60
Let the cost of 1 glass be 1 G.
If Ahmad's aunt spent $0.30 less, each would pay the same amount.
10 G + 0.30 = 7 G + 18.60 - 0.30
10 G - 7 G = 18.60 - 0.30
3 G = 18.30
1 G = 18.30 ÷ 3 = 6.10
Total amount that Ahmad and his aunt spent
= 10 G + 7 G + 18.60
= 17 G + 18.60
= 17 x 6.10 + 18.60
= 103.70 + 18.60
= $122.30
Answer(s): $122.30